V0.8 Type checking, new types, syntax updates and much more

• Type checking added
• Type annotstions for functions and variables added
• None and object types added
• {} and () swaped
• Integers and floats added
• Arithmetical and other int, float operations added
• Logical operators, if, elif, while now work with any type
• Some keywords now accept or retrun integers instead of other types
• Functions arguments now splited with commas
• Set keyword renamed to var and now uses =
• Convert keyword added
• Elif keyword added
• Continue and break keywords added